Now, just hang on a minute! The CD version of Dorati's 1812 is not the first to use real cannons. Dorati made an earlier mono recording using cannons in 1954. I still have this recording on a 7 inch 45 r.p.m. EP disc. The stereo remake used the same cover artwork, which may have caused some confusion. There isn't a great deal of difference between the performances, but the bells do sound different.
I thought there was an earlier version - you are right - has this ever appeared on CD, If not it would make an excellent coupling to the mono minneapolis Rite, of similar vintage.